One of the best applications of Hess's law to calculate the lattice energy of ionic compound is:
Correct answer: C. Born-Haber cycle
- A. Measurement of enthalpy change in a calorimeter
- B. Studying of first law of thermodynamics
- C. Born-Haber cycle
- D. Measurement of a heat of formation of a compound
Explanation
The Born-Haber cycle is a specific application of Hess's Law. It relates the lattice energy of an ionic compound (which cannot be measured directly) to several other measurable enthalpy changes, such as the enthalpy of formation, ionization energy, and electron affinity, in a closed thermodynamic cycle.
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About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
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